As always a great job. Not being a chemist, is there a generic name for sodium silica? You actually soaked the Sodium Silica into the rock wool? One video I thought you showed just sprinkling it onto the rock wool. Is sodium silica water soluble? Apologizes for so many questions. TomC

Here its called glassy water or water glass. Its used as a binder in refractory cements.

Well its sold as as water solution here. The one l used was a wery concentrated one, if you leave a drop on open air it soon dryes or solidifies to a gelatinous mass and if you heat it strongly it popps up like a popcorn, interasting stuff.

Not sure if its the New years schnaps as JO wuld say, but l cant remember posting a video on sodium silicate before…
Yes l soaked the surface of the rockwool. I guess if l wuld soak tge entire plate things wuld be eaven better???

You answered one of my questions. I really like your filter under the front of the car easy access to clean. What did you use for in side the filter bag and to hold it in place on the other side and not come off when operating?
Bob

Andy, have you got any idea how hardneing with CO2 looks like? And what kind of sand is used?

I have great interest in this sodium silicate bond insulations. A while back l posted a pic of perlitic flour l work with at my job. When my rockwool wears out, l will mix sodium silicate with this perlitic flour and see how it performs.

Kristijan,
Here is a straight-talking fellow who makes his own sodium-silicate, then makes refractory materials using that plus perlite and other common materials. Seems to work good. This is his YouTube channel:https://www.youtube.com/channel/UCR4jAT1mvEwRRNo5qv8IewQ
and the sodium silicate:

Kristijan, I’ve been re-watching your video and realized how much better the pictures were with the full screen. Did you get a different camera? Getting professional results. Might have to start charging admission! TomC

How much charcoal do you produce in a day of with heating house/greenhouse ECT.? I have electrical everything, for my home. I retort or fire pit to make charcoal not very efficient I know for charcoal making.
Bob

Bob, in my greenhouse, l can make at least about 80 pounds a day if l am free from work (2 lightups). However! The sistem now is a “smoldering” type retort, makes good char but leaves a terible chimney. It plugged shut from accumulated tar the other day. About a hour of hard core propane burning was neaded to burn the crap out.
Grinder is done, now its time for a bigger kiln.

My chimney in my outside boiler use to plug completely up with tar/creosote. I dropped my lit cutting torch down the chimney and got a little tar burning. Then I connected a 5 ft long copper pipe to my air line on the compressor. I blew air into the hot tar and things really burned. The water in the boiler would boil and over flow before I got all the tar burned into a crumbly material that came loose when I rattled a piece of log chain in the chimney.TomC

Kristijan, I know I’ve mentioned before, but I can’t help starting to wonder when you sleep. An endless stream of new equipment are leaving your production line and you still manage to attend to both family and work. Do you work in shifts with a twin brother?
Your new grinder is a real beast. I like it a lot. It will save time and effort for sure.